I would also like to see full documentation somewhere. There is some documentation in the developer manual, but it seems incomplete. For instance, I am trying to find out how to set a custom image for the login screen (my goal is to have different themes per domain)
and disable the “Themes” from Nextcloud,
then it is possible to customizing the login
have fun.
Custom the Pictures, like Folder’s would be nice, i have done it, but
the Nextcloud-developer whant it not supporting :\ a bit pity…
and behind a time has it no more works …